/* Research study detail page — public-facing surface.
 *
 * Mirror the Discord-embed depth aesthetic from
 * scripts/static/css/customer_dashboard_overrides.css's .tl-research-section
 * styling so the surface feels native to the dashboard, but standalone
 * (no Tabler / no dashboard chrome).
 *
 * Color tokens come from /static/css/titratelab_tokens.css.
 */

/* ── Base ───────────────────────────────────────────────────────────────── */

html { color-scheme: dark; }
* { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--tl-navy, #0d1b2a);
  color: var(--tl-paper, #fafaf7);
  font-family: var(--tl-sans, 'Inter', sans-serif);
  font-size: 16px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}
a { color: var(--tl-gold, #daa520); text-decoration: none; }
a:hover { color: var(--tl-gold-soft, #f4d96f); text-decoration: underline; }

/* ── Nav ────────────────────────────────────────────────────────────────── */

/* Sticky-top so the back-nav is always reachable when reading a long article.
   Wrapper provides the full-width navy strip + bottom hairline; inner row
   keeps the 1280px max-width + logo/links layout. */
.tl-nav-wrap {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(13, 27, 42, 0.92);
  backdrop-filter: blur(8px) saturate(140%);
  -webkit-backdrop-filter: blur(8px) saturate(140%);
  border-bottom: 1px solid rgba(218, 165, 32, 0.18);
}
.tl-nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 14px 32px;
  max-width: 1280px;
  margin: 0 auto;
  gap: 16px;
  flex-wrap: wrap;
}
.tl-nav-links {
  display: flex;
  gap: 22px;
  font-family: var(--tl-mono, 'JetBrains Mono', monospace);
  font-size: 13px;
  flex-wrap: wrap;
  justify-content: flex-end;
  row-gap: 8px;
  align-items: center;
}
.tl-nav-links a {
  color: var(--tl-paper, #fafaf7);
  opacity: 0.78;
  transition: opacity 120ms ease, color 120ms ease;
}
.tl-nav-links a:hover {
  opacity: 1;
  color: var(--tl-gold, #daa520);
  text-decoration: none;
}
/* Primary CTA — "Feeds" gets a subtle gold border so the back-target is
   visually distinct from the marketing/secondary links. */
.tl-nav-links a.tl-nav-link--primary {
  opacity: 1;
  color: var(--tl-gold, #daa520);
  padding: 4px 12px;
  border: 1px solid rgba(218, 165, 32, 0.45);
  border-radius: 999px;
  transition: background-color 120ms ease, border-color 120ms ease;
}
.tl-nav-links a.tl-nav-link--primary:hover {
  background: rgba(218, 165, 32, 0.12);
  border-color: var(--tl-gold, #daa520);
}

/* Mobile nav: tighter gaps + smaller padding so the wordmark + links fit
   on the 320-767px range without forcing horizontal overflow. */
@media (max-width: 767px) {
  .tl-nav { padding: 10px 16px; gap: 12px; }
  .tl-nav-links { gap: 14px; font-size: 12px; }
  .tl-nav-links a.tl-nav-link--primary { padding: 3px 9px; }
}

/* ── Inline breadcrumb back-link (above the headline) ────────────────────
   Secondary affordance — even if the operator misses the top nav, this
   inline "← Feeds" sits right above the article meta strip so the back
   path is always 1 click away. */
.tl-research-breadcrumb {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: var(--tl-mono, 'JetBrains Mono', monospace);
  font-size: 13px;
  color: var(--tl-gold, #daa520);
  opacity: 0.82;
  margin-bottom: 14px;
  text-decoration: none;
  padding: 4px 0;
  transition: opacity 120ms ease, transform 120ms ease;
}
.tl-research-breadcrumb:hover {
  opacity: 1;
  transform: translateX(-2px);
  text-decoration: none;
}
.tl-research-breadcrumb svg { flex-shrink: 0; }

/* ── Layout — two-column on desktop, single on mobile ───────────────────── */

.tl-research-detail {
  max-width: 1280px;
  margin: 0 auto;
  padding: 24px 32px 64px;
}

.tl-research-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 320px;
  gap: 40px;
  align-items: start;
}

@media (max-width: 1023px) {
  .tl-research-layout {
    grid-template-columns: minmax(0, 1fr) 280px;
    gap: 28px;
  }
}

@media (max-width: 767px) {
  .tl-research-detail { padding: 16px; }
  .tl-research-layout {
    grid-template-columns: minmax(0, 1fr);
    gap: 24px;
  }
}

/* ── Article body column ────────────────────────────────────────────────── */

.tl-research-body {
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid var(--tl-border, rgba(255,255,255,0.1));
  border-radius: 8px;
  padding: 32px;
  min-width: 0; /* enables text wrapping inside grid */
}

@media (max-width: 767px) {
  .tl-research-body { padding: 20px 16px; }
}

/* ── Hero meta strip ────────────────────────────────────────────────────── */

.tl-research-hero { margin-bottom: 16px; }

.tl-research-meta-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 16px;
}

.tl-chip {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 4px 10px;
  border-radius: 999px;
  font-family: var(--tl-mono, monospace);
  font-size: 12px;
  font-weight: 500;
  text-decoration: none;
  border: 1px solid rgba(255,255,255,0.15);
  background: rgba(255,255,255,0.05);
  color: var(--tl-paper, #fafaf7);
  white-space: nowrap;
}
.tl-chip:hover { background: rgba(255,255,255,0.1); text-decoration: none; }

.tl-chip-peptide {
  background: rgba(218, 165, 32, 0.15);
  border-color: rgba(218, 165, 32, 0.4);
  color: #f4d96f;
}
.tl-chip-class {
  background: rgba(74, 143, 188, 0.18);
  border-color: rgba(74, 143, 188, 0.45);
  color: #8fc1e3;
}
.tl-chip-source {
  background: rgba(255,255,255,0.08);
  border-color: rgba(255,255,255,0.18);
}

/* Evidence-tier chip — color-coded per mockup table */
.tl-chip-evidence[data-tier="meta-analysis"] { background: #daa520; color: #1a1f2e; border-color: #daa520; }
.tl-chip-evidence[data-tier="rct"]           { background: #4a8fbc; color: #fff; border-color: #4a8fbc; }
.tl-chip-evidence[data-tier="cohort"]        { background: #5a9970; color: #fff; border-color: #5a9970; }
.tl-chip-evidence[data-tier="case-series"]   { background: #c08930; color: #1a1f2e; border-color: #c08930; }
.tl-chip-evidence[data-tier="preclinical-animal"] { background: #8e72a8; color: #fff; border-color: #8e72a8; }
.tl-chip-evidence[data-tier="in-vitro"]      { background: #7a8a9c; color: #fff; border-color: #7a8a9c; }
.tl-chip-evidence[data-tier="review"]        { background: #5a8a9c; color: #fff; border-color: #5a8a9c; }
.tl-chip-evidence[data-tier="case-report"]   { background: #9c8a7a; color: #fff; border-color: #9c8a7a; }

.tl-chip-n      { background: rgba(142, 114, 168, 0.15); border-color: rgba(142, 114, 168, 0.4); }

/* ── Headline ───────────────────────────────────────────────────────────── */

.tl-research-headline {
  font-family: var(--tl-serif, 'Source Serif Pro', serif);
  font-weight: 600;
  font-size: 32px;
  line-height: 1.18;
  letter-spacing: -0.3px;
  margin: 8px 0 6px;
  text-wrap: balance;
  color: var(--tl-paper, #fafaf7);
}
@media (min-width: 768px) {
  .tl-research-headline { font-size: 38px; }
}

.tl-research-original-title {
  font-family: var(--tl-mono, monospace);
  font-size: 13px;
  color: rgba(250,250,247,0.55);
  margin-bottom: 12px;
}

/* ── Action row ─────────────────────────────────────────────────────────── */

.tl-research-action-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 16px 0 8px;
}

.tl-action {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 14px;
  font-family: var(--tl-sans, sans-serif);
  font-size: 13px;
  font-weight: 500;
  border-radius: 6px;
  border: 1px solid rgba(255,255,255,0.2);
  background: rgba(255,255,255,0.04);
  color: var(--tl-paper, #fafaf7);
  cursor: pointer;
  transition: background-color 150ms ease;
  text-decoration: none;
}
.tl-action:hover { background: rgba(255,255,255,0.1); text-decoration: none; }

.tl-action-primary {
  background: rgba(218, 165, 32, 0.15);
  border-color: rgba(218, 165, 32, 0.4);
  color: #f4d96f;
}
.tl-action-primary:hover { background: rgba(218, 165, 32, 0.25); }

.tl-action-save[data-saved="true"] {
  background: rgba(218, 165, 32, 0.25);
  border-color: var(--tl-gold, #daa520);
  color: var(--tl-gold, #daa520);
}
.tl-action-pro-locked { opacity: 0.72; cursor: not-allowed; }

/* ── Divider ────────────────────────────────────────────────────────────── */

.tl-research-divider {
  border: 0;
  border-top: 1px solid rgba(218, 165, 32, 0.12);
  margin: 20px 0;
}

/* ── Sections ───────────────────────────────────────────────────────────── */

.tl-research-section {
  margin: 24px 0;
}

.tl-research-section-header {
  font-family: var(--tl-mono, monospace);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  color: var(--tl-gold, #daa520);
  margin: 0 0 10px;
}

.tl-research-section-body {
  font-family: var(--tl-serif, 'Source Serif Pro', serif);
  font-size: 17px;
  line-height: 1.65;
  color: rgba(250,250,247,0.94);
}
.tl-research-section-body p { margin: 0 0 10px; }
.tl-research-section-body strong { color: var(--tl-paper, #fafaf7); font-weight: 600; }
.tl-research-section-body em { font-style: italic; }
.tl-research-section-body code {
  font-family: var(--tl-mono, monospace);
  font-size: 0.88em;
  background: rgba(255,255,255,0.08);
  border-radius: 3px;
  padding: 1px 5px;
}
.tl-research-section-body blockquote {
  border-left: 3px solid var(--tl-gold, #daa520);
  padding: 4px 16px;
  margin: 12px 0;
  color: rgba(250,250,247,0.88);
  font-style: italic;
}

.tl-research-bullets {
  margin: 0;
  padding-left: 24px;
  font-family: var(--tl-serif, 'Source Serif Pro', serif);
  font-size: 17px;
  line-height: 1.55;
}
.tl-research-bullets li { margin-bottom: 8px; }

/* Why It Matters — gold-tinted backdrop */
.tl-research-why {
  background: rgba(218, 165, 32, 0.06);
  border-left: 3px solid var(--tl-gold, #daa520);
  padding: 16px 20px;
  border-radius: 4px;
  margin: 24px 0;
}

/* Limitations — warning aside */
.tl-research-limitations {
  background: rgba(245, 158, 11, 0.08);
  border-left: 3px solid #f59e0b;
  padding: 12px 16px;
  border-radius: 4px;
  margin: 20px 0;
  font-size: 14px;
  color: rgba(250,250,247,0.85);
  display: flex;
  gap: 8px;
  align-items: flex-start;
}
.tl-research-limitations em { font-style: italic; }

/* ── PICO panel ─────────────────────────────────────────────────────────── */

.tl-research-pico .tl-pico-grid {
  display: grid;
  grid-template-columns: 140px 1fr;
  gap: 8px 18px;
  background: rgba(74, 143, 188, 0.06);
  border: 1px solid rgba(74, 143, 188, 0.2);
  border-radius: 6px;
  padding: 14px 18px;
}
@media (max-width: 480px) {
  .tl-research-pico .tl-pico-grid {
    grid-template-columns: 1fr;
    gap: 4px;
  }
}
.tl-pico-row { display: contents; }
.tl-pico-label {
  font-family: var(--tl-mono, monospace);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 1px;
  text-transform: uppercase;
  color: rgba(143, 193, 227, 0.95);
  padding-top: 2px;
}
.tl-pico-value {
  font-family: var(--tl-serif, 'Source Serif Pro', serif);
  font-size: 16px;
  color: rgba(250,250,247,0.94);
}
.tl-pico-supplementary {
  margin-top: 12px;
  font-family: var(--tl-serif, 'Source Serif Pro', serif);
  color: rgba(250,250,247,0.85);
  font-size: 15px;
}

/* ── Tag chips ──────────────────────────────────────────────────────────── */

.tl-research-tag-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin: 16px 0;
}
.tl-tag {
  font-family: var(--tl-mono, monospace);
  font-size: 12px;
  padding: 3px 9px;
  border-radius: 4px;
  border: 1px solid rgba(255,255,255,0.18);
  background: rgba(255,255,255,0.05);
  color: rgba(250,250,247,0.92);
  text-decoration: none;
}
.tl-tag:hover { background: rgba(255,255,255,0.12); text-decoration: none; }
.tl-tag-peptide       { border-color: rgba(218, 165, 32, 0.5); color: #f4d96f; }
.tl-tag-class         { border-color: rgba(74, 143, 188, 0.5); color: #8fc1e3; }
.tl-tag-mechanism     { border-color: rgba(90, 138, 156, 0.6); color: #8ec5d5; }
.tl-tag-applicability { border-color: rgba(192, 137, 48, 0.5); color: #e0b87f; }
.tl-tag-generic       { background: rgba(255,255,255,0.08); }

/* ── Feedback (upvote/downvote) ─────────────────────────────────────────── */

.tl-research-feedback {
  display: flex;
  align-items: center;
  gap: 12px;
  margin: 20px 0;
  padding: 12px 0;
  border-top: 1px solid rgba(255,255,255,0.08);
  border-bottom: 1px solid rgba(255,255,255,0.08);
}
.tl-feedback-prompt {
  font-family: var(--tl-mono, monospace);
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  color: rgba(250,250,247,0.6);
  margin-right: 8px;
}
.tl-feedback-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 12px;
  font-family: var(--tl-sans, sans-serif);
  font-size: 14px;
  border-radius: 6px;
  border: 1px solid rgba(255,255,255,0.18);
  background: transparent;
  color: var(--tl-paper, #fafaf7);
  cursor: pointer;
  transition: background-color 150ms ease;
}
.tl-feedback-btn:hover { background: rgba(255,255,255,0.07); }
.tl-feedback-btn.is-active {
  background: rgba(218, 165, 32, 0.18);
  border-color: var(--tl-gold, #daa520);
  color: var(--tl-gold, #daa520);
}
.tl-feedback-count { font-variant-numeric: tabular-nums; font-weight: 500; }

/* ── Footer meta ────────────────────────────────────────────────────────── */

.tl-research-footer-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  font-family: var(--tl-mono, monospace);
  font-size: 11px;
  color: rgba(250,250,247,0.5);
  margin-top: 16px;
}
.tl-research-footer-meta code {
  background: rgba(255,255,255,0.05);
  padding: 1px 5px;
  border-radius: 3px;
}

/* ── Sidebar ────────────────────────────────────────────────────────────── */

.tl-research-sidebar {
  position: sticky;
  top: 16px;
  align-self: start;
  max-height: calc(100vh - 32px);
  overflow-y: auto;
  padding-right: 4px; /* scrollbar gutter */
}

@media (max-width: 767px) {
  .tl-research-sidebar {
    position: static;
    max-height: none;
    overflow: visible;
    padding-right: 0;
  }
}

.tl-related-buckets {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.tl-related-bucket-head {
  font-family: var(--tl-mono, monospace);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 1.4px;
  text-transform: uppercase;
  color: var(--tl-gold, #daa520);
  margin: 0 0 8px;
  padding-bottom: 6px;
  border-bottom: 1px solid rgba(218, 165, 32, 0.18);
}
.tl-related-peptide-name { color: var(--tl-gold-soft, #f4d96f); }
.tl-related-bucket-sub {
  font-weight: 400;
  letter-spacing: 0.6px;
  text-transform: none;
  color: rgba(250,250,247,0.45);
  font-size: 10px;
  display: block;
  margin-top: 2px;
}

.tl-related-item {
  display: block;
  padding: 8px 10px;
  border-radius: 4px;
  background: transparent;
  color: var(--tl-paper, #fafaf7);
  text-decoration: none;
  border-bottom: 1px solid rgba(255,255,255,0.05);
  transition: background-color 150ms ease;
}
.tl-related-item:hover {
  background: rgba(218, 165, 32, 0.06);
  text-decoration: none;
}
.tl-related-item:last-child { border-bottom: 0; }
.tl-related-headline {
  font-family: var(--tl-sans, sans-serif);
  font-size: 14px;
  line-height: 1.35;
  font-weight: 500;
  margin-bottom: 4px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.tl-related-meta {
  font-family: var(--tl-mono, monospace);
  font-size: 11px;
  color: rgba(250,250,247,0.55);
}
.tl-related-tier { color: var(--tl-gold, #daa520); }
.tl-related-empty {
  font-family: var(--tl-sans, sans-serif);
  font-size: 12px;
  color: rgba(250,250,247,0.4);
  font-style: italic;
  margin: 4px 0 0;
}

.tl-related-cta {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding-top: 16px;
  border-top: 1px solid rgba(255,255,255,0.08);
}
.tl-related-cta-btn {
  display: block;
  text-align: center;
  padding: 8px 12px;
  font-family: var(--tl-sans, sans-serif);
  font-size: 13px;
  font-weight: 500;
  border-radius: 6px;
  background: rgba(255,255,255,0.04);
  border: 1px solid rgba(255,255,255,0.18);
  color: var(--tl-paper, #fafaf7);
  cursor: pointer;
  text-decoration: none;
}
.tl-related-cta-btn:hover { background: rgba(255,255,255,0.1); text-decoration: none; }
.tl-related-cta-subscribe {
  background: rgba(218, 165, 32, 0.12);
  border-color: rgba(218, 165, 32, 0.4);
  color: #f4d96f;
}
.tl-related-cta-pro-lock { opacity: 0.78; }

/* ── Page footer ────────────────────────────────────────────────────────── */

.tl-research-page-footer {
  max-width: 1280px;
  margin: 48px auto 24px;
  padding: 16px 32px;
  border-top: 1px solid rgba(255,255,255,0.08);
  text-align: center;
  font-family: var(--tl-mono, monospace);
  font-size: 12px;
  color: rgba(250,250,247,0.5);
}
.tl-research-page-footer em { color: rgba(250,250,247,0.7); font-style: italic; }
.tl-research-page-footer div + div { margin-top: 6px; }
.tl-research-page-footer a { margin: 0 4px; }

/* ── 404 ────────────────────────────────────────────────────────────────── */

.tl-research-404 {
  max-width: 640px;
  margin: 48px auto;
  padding: 32px;
  font-family: var(--tl-serif, 'Source Serif Pro', serif);
}
.tl-research-404 h1 {
  font-size: 32px;
  font-weight: 600;
  letter-spacing: -0.3px;
  margin: 0 0 16px;
}
.tl-research-404 code {
  font-family: var(--tl-mono, monospace);
  background: rgba(255,255,255,0.08);
  padding: 1px 5px;
  border-radius: 3px;
  font-size: 0.88em;
}
.tl-research-404 ul { padding-left: 20px; }
.tl-research-404 li { margin-bottom: 8px; }
.tl-research-cta {
  display: inline-block;
  padding: 10px 18px;
  background: rgba(218, 165, 32, 0.15);
  border: 1px solid rgba(218, 165, 32, 0.4);
  color: #f4d96f;
  border-radius: 6px;
  text-decoration: none;
  font-family: var(--tl-sans, sans-serif);
  font-size: 14px;
}